Mirny Diamond Mine, Siberia 
Mirny Diamond Mine in Siberia is the world's second largest crater created by humans. Path to the bottom of the crater reached 1,700 feet into the gold mining area that annually produce two million carats. Air transportation from the top to the crater is very limited for the helicopter after a number of accidents due to airflow.

Mirny Diamond Mine in Siberia is the world's second largest crater created by humans. Path to the bottom of the crater reached 1,700 feet into the gold mining area that annually produce two million carats. Air transportation from the top to the crater is very limited for the helicopter after a number of accidents due to airflow.
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